Double sampling plans indexed by point of control and inflection point

Three tables for selection of double sampling plans each for the cases when n 2 = n 1 and when n 2 = 2n 1 with anyu one of the following combination of entry parameters are given : 1) the indifference quality level and the average out-going quality limit; 2) the indifference quality level with relative slope of the curve at that quality level and 3) the quality level corresponding to the inflection point with relative slope of the OC curve at that quality level. Two tables enabling the transition from one set of parameters to match the OC curve of other similar sets are also given.